The Anti-Fascist Action were backed by the German Communist Party.
The Iron Front were set up by SocDems as an anti-communist alternative to AntiFa.
Because as we all know, the only way to fight disease is to oppose medicine and promote a homeopathic snake oil instead.
funnily enough i actually had the thought that they might be trots earlier today and went looking for evidence of such
didn't find anything explicit but i didn't get too deep into looking
Other posters here said they were Western anarchists, which might be the case.
that tracks. out of curiosity i went through and peeked at the articles that come up when you search for lenin, then did the same for stalin.
https://stories.workingclasshistory.com/tag/8568/joseph-stalin
i have also seen them running content made with (alleged) chinese migrant workers, which could of course go either way. but given their apparent leanings...